WIP minetest <-> laby import/export

- currently possible to export a laby into minetest
- start of a lua content parser to import .we into lab

java/org/artisanlogiciel/lua/LuaString.java

@@ -0,0 +1,17 @@
+package org.artisanlogiciel.lua;
+
+public class LuaString
+    extends LuaObject
+{
+    String string;
+
+    public LuaString(StringBuffer stringBuffer)
+    {
+        string = stringBuffer.toString();
+    }
+
+    @Override
+    public String toString() {
+        return '"' + string + '"' ;
+    }
+}